>> Sample 1 - Musical instrument with S4A Introduction ■ Making a light-powered theremin-like musical instrument, with an infrared sensor and a RGB LED with Scratch 4 Arduino ■ Taking advantage of Scratch's sound blocks ■ http://www.youtube.com/watch?v=RJAgSUIf12U >>Sample 1 - Musical instrument with S4A Schematics >>Sample 1 - Musical instrument with S4A Code tips and questions ● To select an instrument: ● To play a note: ● To store the sensor value into a variable (in order to use it several times without changing its value): ● To transform the infrared sensor value into a number note between 48 and 72, and store it into a variable: ● The same method can be used to turn on every color of the RGB LED depending of the value of sensorValue: ● Question: how to stop playing (and turn the led off) when the sensor does not detect anything? >> Citilab Scratch Team Thank you http://www.citilab.eu Jordi Delgado . Bernat Romagosa . Joan Güell . Victor Casado . José García http://seaside.citilab.eu scratch@citilab.eu